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在vue中当你往数组里push对象时，得到的那个数组(this.arr)就会变成这种形式
一开始你有点不解，为什么变成了这个样子 ，于是你尝试拿到对象里面的值，然后就成了这样
console.log(this.arr[0]) //undefined
此时网上有人说只需要用JSON.parse(JSON.stringify(this.arr)) 转一下就可以了，于是你兴致勃勃的去尝试了，但是得到的确是
竟然变成了空数组，你这时需要的不是数组里有值，而是人工呼吸，血压飙升，于是你又在想，这情况是不是和异步同步有关，之前的代码都是在异步代码里写的。所以你又尝试写在同步代码块里
function() { let arr=JSON.parse(JSON.stringify(this.StoreArr))
console.log(arr) },
此时你发现数组是正常的了，即使你把数组赋值给data，也能正常拿到值了。
总结，遇到上面这种情况的数组时，需要用JSON.parse(JSON.stringify(this.arr))转译，并且一定要在同步的代码块中执行（重要），很多人都没说清楚，导致我不断试错了一上午，血压飙升！！！！！！
